ASHRAE F24-2009 (SI)

Airflow around buildings affects worker safety, process and building equipment operation, weather and pollution protection at inlets, and the ability to control indoor temperature, humidity, air motion, and contaminants. Wind causes variable surface pressures on buildings that change intake and exhaust system flow rates, natural ventilation, infiltration and exfiltration, and interior pressures. The mean flow patterns and turbulence of wind passing over a building can recirculate exhaust gases to air intakes. This chapter provides basic information for evaluating windflow pat-terns, estimating wind pressures, and identifying problems caused by the effects of wind on intakes, exhausts, and equipment. In most cases, detailed solutions are addressed in other chapters. Related information can be found in Chapters 11, 14, 16, and 36 of this volume; in Chapters 29, 30, 44, 46, and 52 of the 2007 ASHRAE HandbookHVAC Applications; and in Chapters 29, 34, and 39 of the 2008 ASHRAE HandbookHVAC Systems and Equipment.

Chapter Table of Contents

Flow Patterns
Wind Pressure on Buildings
Wind Effects on System Operation
Building Pressure Balance and Internal Flow Control
Physical and Computational Modeling
Symbols

ISBN: 978-1-933742-55-7
ISSN: 1523-7282

Units: SI

Citation: 2009 ASHRAE Handbook -- Fundamentals: Chapter 24, Airflow Around Buildings



Product Code(s): D-F242009SI